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CHMB16H3 (16)
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Textbook notes on Lecture 2

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Department
Chemistry
Course
CHMB16H3
Professor
Kagan Kerman
Semester
Fall

Description
Lecture 2 1-2. Chemical Concentrations Solution –a homogeneous mixture of two or more substances Solute –minor species in a solution Solvent –major species in a solution Concentration –states how much solute is contained in a given volume or mass of solution/solvent Molarity and Molality - Mole is Avogadro’s # of particles - Molarity (M) –the # of moles of a substance per liter of solution (1L= 10^-3 m^3) - Atomic mass –# of grams containing avogadro’s number - Molecular mass –sum of atomic masses (g/mol) - Electrolyte –substance that dissociates into ions in solution. More associated in water - Formal concentration (F) –molarity of a strong electrolyte - Formula mass (FM) –molecular mass of a strong electrolyte - Molality (m) –concentration as moles of substance per kilogram of solvent ; independent of temperature Percent Composition - Expressed as a weight percent (wt%) - Wt% = mass of solute/ mass of total solution or mixture * 100 - Volume percent (vol%) = volume of solute / volume of total solution * 100 1-3 Preparing solutions - To prepare soln with desired molarity, weigh out corr
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